GB150737A - Improvements in or relating to illuminating devices - Google Patents

Improvements in or relating to illuminating devices

Info

Publication number
GB150737A
GB150737A GB25647/20A GB2564720A GB150737A GB 150737 A GB150737 A GB 150737A GB 25647/20 A GB25647/20 A GB 25647/20A GB 2564720 A GB2564720 A GB 2564720A GB 150737 A GB150737 A GB 150737A
Authority
GB
United Kingdom
Prior art keywords
mirror
condenser
annular
revolution
varied
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB25647/20A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB150737A publication Critical patent/GB150737A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

150,737. Verain, L. F. Sept. 6, 1919, [Convention date]. Lighting, systems of.-In apparatus for illuminating operation tables, draughtmen's tables, metal chaser's and engraver's benches, &c., a light source a is arranged at the focus of an annular condenser b, and the zone' of light produced is reflected on to the table d &c. The reflecting- means may consist of a conical mirror c, several flat mirrors, or an annular mirror whose curvature in places containing the axis of revolution can be varied. The condenser b can be completed by a mirror g or by an optical device capable of transforming most of the light into the luminous beam. The Specification as open to inspection under Sect. 91 (3) (a) states that the curvature of the annular reflector can be varied in planes at rightangles to the axis of revolution and that the condenser may be replaced by a mirror or other optical device. This subject-matter does not appear in.the Specification as accepted.
GB25647/20A 1919-09-06 1920-09-06 Improvements in or relating to illuminating devices Expired GB150737A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR150737X 1919-09-06

Publications (1)

Publication Number Publication Date
GB150737A true GB150737A (en) 1921-09-29

Family

ID=8875688

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25647/20A Expired GB150737A (en) 1919-09-06 1920-09-06 Improvements in or relating to illuminating devices

Country Status (1)

Country Link
GB (1) GB150737A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4315117A1 (en) * 1993-05-07 1994-11-10 Klose Abwassertech Gmbh Equipment for the cleaning and treatment of waste water by means of electrolysis

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4315117A1 (en) * 1993-05-07 1994-11-10 Klose Abwassertech Gmbh Equipment for the cleaning and treatment of waste water by means of electrolysis

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